Map-case.



A. S. SMITH.

MAP GASE APPLIOATION rfmn 00124, 1906.

Patented May '18, 1909.

UNITE ALBERT SIMPSON SMITH, OF NEW YORK, N. Y.

MAP-CASE Specification of Letters Patent.

Patentedll/[ay 18, 1909.

Application filed October 4, 1906. Serial No. (537,498.

To all whom it may concern:

Be it known that I, ALBERT SIMPSON:

SMITH, citizen of the United States, and resident of New York, county of New York, State of New York, have invented certain new and useful Improvements in Map-Cases, of which the following is a specification.

My invention relates to map cases, and more particularly to that class in which is provided means for holding the map in a rolled condition.

One of the objects is to provide. means whereby the tension of the map roller may be increased without removing the roller from the case.

Referring to the drawings :-Figure l is a iront view'of a map case constructed in conformity with this invention, showing the map edge in section in the center of the case opening. Fig. 2 is an end view of the case. .Big. 3 is a longitudinal section of the case, showthe arts enlarged. Fig. 4 is a detail view of t e ratchet case, the wheel and pawl being shown in dotted lines. Fig. 5 is a dotail view of the inner plate of the ratchet case. Fig.6 is a detail edge view oi the ratchet wheel. the said ratchet wheel. Fig. 8isa detail view in perspective of the said ratchet wheel.

A indicates a sheet metal, cylindrical case provided with beaded edges *-a-- aon each side of the opening --B throu 'h which the map drawn when displaye l.hccasc-A-is provided with an extension indicated by A The head ---E is inserted in the case -----A after the cap -C is in position and is of such diameter as to prevent the case end from being; compressed. A bearing for the end of the map roller l.) is formed in the head ---E-.

At the other end oi the OZLSL --A-- is the i ratchet F which forms a head for the case -A. The ratchet case F is provided with a groove -F, and is in sorted in the end of the case -'A for the annular extension A to rest in the l Fig. 7 is a detail side view oi" I which the rectangular end J of the roller *O- is inserted. The ratchet wheel l is provided with two undercut extensions l and I These extensions are undercut to l'orin. slots with which cap G co-acts. (lap G- is provided with two circular openings G and large enoug and -I"-. By rotating the cap -fG, the Esolid top of the cap G- passes into the F slots in the extensions, l -.l." The l cap -G-- is then looked .on the case, as

shown in Fig. 2.

Fig. 5 shows the manner in which the pawl K- is mounted. The plate H is provided with. a raised semicircular shoulder H which shoulder is slightly deeper than the thickness of the ratchet wheel, and the pawl is of the same thickness as the ratchet wheel, so that when the pawl is placed in position it is held in operative relation with the ratchet -l The shoulder H serves to prevent the ca --F be ing jammed upon the pawl to interfere with the free movement of the same. The spring -L presses the pawl in contact with the itatchet l-. T he spring L is secured to the plate l"l by a loop The ratchet case --F-- of whicl'i. -.l.-l forms a part is provided with any suitable means for securing it to the case A so as I not to be rotated when the ratchet i is 1 rotated. The ratchet wheel. together with the rectangular end -J and the spring inside the roller O- is rotated by rotating the cap i}- which is connected to the ratchet b the bayonet joint as above descrih ed.

In assembling, the roller with the map attached, the cap. C, and head E' are (which is the usual window shade roller with spring, ratchet, and pawl complete) is inserted. through the other end of the case, at lowing the free edge of the ma -N to extend through the opening -'--.!1- of the case A- as shown in Fig. The ratchet case --F-- is now placed in position in the case A, the rectangular end -J-' oi the map roller being; inserted in the slot -i-. The extension -A is forced into the groove The cap G is then placed over the end of the case A--, and rotated. into position with respect to the extensions l -I so the ends of the latter placed in position, and then the roller i. to pass over the extensions --l" the various named parts together.

To increase the tension of the spring within the roller YO, I rotate the cap -G-- and by it the ratchet Wheel '-lI, which engages, the rectangular end -'-J- of the spring Within the roller O-.

What I claim as new in my invention is:

1. A map case comprising a cylinder having an inward projection near the end to engage an interior head; a head to rest within said cylinder to engage said projection to prevent lateral displacement; a winding mechanism rotatably mounted in said head to move in one direction only to increase the tension of the spring in the roller on which the map is mounted; an automatically controlled spring actuated roller mounted in said head and engaged with said winding mech-- anism; and a cap to fit over the end of said cylinder to engage said winding mechanism.

2., A, map case comprising a cyiinder hav ing an inward extension at the end of said cylinder; a head to rest Within said cylinder having a groove in its outer edge to engage said extension to prevent lateral displacement; a winding mechanism rotatably mounted in said head to move in one direction only a spring actuated roller engaged with said Winding mechanism; and a cap to :[it over the end of said cylinder to ei'igage said Winding mechanism. v

3. A map case con'iprising a cylinder having, an inward extension at the end of said cylinder; a head to rest within said cylinder having a groove in its outer edge to engage said extension to prevent lateral displacement; awinding mechanism consisting of a hub mounted in said head 'and' having a rectangular central opening to engage the end of a spring rtliing mechanism for the map roller, said. hub being provided With a ratchet wheel and a detent mounted 011 said head to ei'igage said ratchet wheel; a spring actuated roller. engaged with said winding mechanism; and a cap to lit over the end of said cylinder to engage said winding mech-' anism.

i. A map case comprisin a cylinder having an inward extension at t 1e end ofsaid cylinder; a head to rest within said cylinder having a groove in its outer er to engage said extension to prevent lateral displace ment; a winding mechanism consisting of a hub mounted in said head and having a ree rta'ngular central opening to engage the end of a spring rolling meclmnism for the map roller, said hub being provided with a ratchet wheel, and a detent mounted on said head to engage said ratchet wheel; a spring actuated roller engaged with said winding mechanism; a cap to fit over the end of said cylinder to ensaid winding mechanism; and hooklihe extensions of said winding mechanism to engage said cap.

In Witness whereof I have signed my name to these specifications in the presence of two witnesses ALBERT SIMPSON SMITIL Witnesses:

L. E. Bron-s, M. A. CARROLL. 

